Stop motion for winding and twisting machine



Dec. 20, 1966 J. E. DI MEGLIO AL 3,292,358

STOP MOTION FOR WINDING AND TWISTING MACHINE Filed May 12. 1964 INVENTOR Joiph Dzbleglia VVzZZzam sandafler ATTORNEYS United States PatentOfi ice Patented Dec. 20, 1966 3,292,358 STOP MOTION FOR WINDING ANDTWISTING MACHINE Joseph E. Di Meglio, Providence, KL, and WilliamSandager, North Dighton, Mass, assignors to Leesona Corporation,Warwick, R.I., a corporation of Massachusetts Filed May 12, 1964, Ser.No. 366,773 7 Claims. (Cl. 5789) The present invention relates tomachines for twisting and winding a strand of yarn, and relates moreparticularly to such a machine having means for stopping the windingmechanism and the twisting mechanism upon the breakage or exhaustion ofthe strand of yarn being operated upon.

In the following specification and claims the term yarn is employed in ageneral sense to apply to all kinds of strand materials, either textileor otherwise, and the designation package is intended to mean theproduct of a winding or twisting machine whatever its form.

. A customary operation in the textile industry is to impart twist to astrand of yarn by rotating a spindle carrying a supply of yarn, drawingthe yarn from said supply, and winding the yarn thus twisted into apackage by means of a winding mechanism. In recent years multiple twistspindles have been employed in this operation in constantly increasingnumbers. It is recognized by those skilled in the art that multipletwist spindles possess advantages over the more conventional singletwist spindles in that their \use permits a strand of yarn to be twistedtwice as fast as can be twisted on a single twist spindle. However, amajor disadvantage inherent in multiple twist spindles is the fact thatthe supply of yarn carried thereby tends to feed out of the spindle,under the action of con trifiwgal force, and wind resistance in theevent the strand breaks between the spindle and the winding mechanism.The constantly feeding broken strand of yarn, which is rapidly rotatedby the mechanism, beats against adjacent parts of the mechanism and isthus broken into small fragments which contaminate yarn being twisted byad jacent spindles and which enters moving parts of the machinery todamage the same.

Attempts have been made in the past to provide multiple twist spindleswith yarn trapping devices designed -to permit the strand of yarn beingtwisted to pass through the spindles so long as the strand remainedunbroken, but adapted upon breakage of the strand to catch the yarn andhold it to prevent the above-described feeding thereof. Many of thesedevices did not function in the manner intended or if they did functionthey had to be changed or adjusted each time a different diameter yar-nwas twisted by the spindle.

It is accordingly one object of the present invention to provide amechanism for preventing a broken strand of yarn from feeding from amultiple twist spindle.

Another object of the present invention is to provide a mechanism forstopping the operation of a multiple twist spindle upon breakage orexhaustion of the strand of yarn being twisted.

Another object of the present invention is to provide a twisting andwinding unit wherein breakage or exhaustion of the strand of yarn beingtwisted and wound will cause the winding portion of the mechanism tobecome inoperative and wherein the action of said winding portion inassuming its inoperative position will, concurrently therewith, causethe twisting portion thereof to become inoperative.

Yet, another object of the present invention is to provide a mechanismfor stopping the operation of a multiple twist spindle upon breakage orexhaustion of the strand of yarn being twisted thereby, and to preventthe strand of yarn extending from said spindle from further feeding,which said mechanism is fixed in a stationary position to receive andstop the operation of said spindle.

An additional object of the present invention is to provide a mechanismfor stopping the operation of a multi ple twist spindle including abrake fixed in a stationary position relative to said spindle, saidbrake being mounted on a member which permits said brake to self-alignwith said spindle to thereby stop said spindle effectively withoutchatter or other vibration from the spindle or brake.

Still a further object of the present invention is to provide amechanism for stopping the operation of a multiple twist spindle and forpreventing a broken strand of yarn from feeding from said spindle whichis economical to manufacture and which is durable and reliable in use.

Other objects of the invention will in part be obvious and will in partappear hereinafter.

The invention accordingly comprises the apparatus possessing theconstruction, combination of elements and arrangement of parts which areexemplified in the following detailed disclosure, and the scope of theapplication of which will be indicated in the claims.

For a fuller understanding of the nature and objects of the inventionreference should be had to the following detailed description taken inconnection with the accompanying drawing wherein:

FIG. 1 is a side elevational view of a mechanism embodying the presentinvention;

FIG. 2 is an enlarged fragmentary side elevational view showing thedetails of the breaking mechanism of the present invention; and

FIG. 3 is a perspective view of the yarn trapping and spindle breakingmembers of the present invention, these parts being illustrated in theirinoperative positions.

The present invention relates to a machine for twisting and winding astrand of yarn, said machine having one portion thereof comprising .atwisting spindle and another por-tion thereof comprising a winding unit.The winding unit is provided with a knock-01f or stop motion adapted tomove a portion of the winding unit to place that unit in a stopped orinoperative position when the strand of yarn being twisted and woundbreaks or is exhausted, The winding unit and the twisting spindle areinterconnected so that the operation of said stop motion causes thetwisting spindle to be disconnected from its driving means and a breakto be applied to the spindle to stop its rotation.

The present drawings illustrate one unit of a gang machine comprising aplurality of winding units and twisting spindles all substantiallyidentical and all adapted to be driven from a common source of power.However, it should be understood that each unit can be individuallydriven if desired and need not be gang mounted.

Referring now to FIG. 1, the individual winding units may be arranged inany suitable number spaced along a frame 10 supported uprightly from 'abase 12 resting on the floor. The winding unit comprises a drive shaft14 extending the whole length of the machine and being suitablyjourn-alled in bearings mounted in bearing supports fastened to frame10, said bearings and bear-ing supports not being herein illustrated.Power transmission means are enclosed in :a casing, not shown, at thehead end of the gang machine with power taken from a suitable sourcesuch :as an electric motor within the casing. A series of drive-rolls 16are mounted fast on the horizontal shaft 14 that extends longitudinallyof the machine, the rolls being disposed in space relationshipcorresponding to the spacing of the winding spindles of the severalunits. Desirably, each drive roll 16 is provided with a frictionalannulus such as cork or the like to improve its frictional drivingqualities. As illustrated herein, each winding unit of the machine isadapted to wind a package of yarn rotated by surface contact with itsrespective drive roll 16. The packages of yarn P are normally wound onpaper cop-tubes C that serve as cores for supporting the yarn mass. Thecop-tubes C are suitably held on winding mandrels or cop-holders 20,each rotatably mounted on a winding spindle 22 supported betweenbifurcations 23a, 23b at the outer end of a pivoted arm 24. A set screw25 serves to hold spindle 22 in position between the bifurcations 23a,23b. The support or pivoted arm 24 for cop-holder 20 may be of the usualconstruction having an inner end which is rotatably supported on anelongated shaft 26 clamped in bearing supports 28 aflixed to frame 10.Arm 24 is thereby adapted to swing upwardly and permit winding spindle22 to recede from drive roll 16 during the building of package P on thecop-tube C. A forwardly extending finger or grip 30 serves as a meanswhereby the operator may manually raise and lower pivoted arm 24relative to drive roll 16.

A latch bar 32 is rockably supported on a stud 34 em bedded in theintermediate region of pivoted arm 24. The forward end 32a of latch bar32 lays in juxtaposition with grip 30 so that release of latch bar 32and manual movement of pivoted arm 24 may be effected as a single motionwhen the operator grasps grip 30 to lower spindle 22. The rear end oflatch bar 32 is formed as a catch 32b. Cooperative with catch 32b is acollar 36 locked onto shaft 26. Collar 36 has a step 36a providedtherein, which said step is arranged to receive and seat catch 32b. Aspiral spring 38 surrounds stud 34 and is connected at one end to saidstud. The opposite end of spring 38 is attached to latch bar 32 andserves to bias the bar counterclockwise about stud 34 (FIG. 1) to urgecatch 32b into engagement with the outside diameter of collar 36. Itwill be apparent that when pivoted arm 24 is rocked to a plane wherecatch 32b is in register with step 36a, the catch will snap intoengagement with the step under the biasing force of spring 38 to therebyhold spindle 22 in an elevated position off :of drive roll 16.

The yarn breakage or exhaustion detecting means is constituted as a yarnengaging bail 40 projecting parallel to the axis of spindle 22 anddisposed somewhat forwardly of drive roll 16. Bail 40 is affixed, .atone of its ends, to a stilt rod 42. In turn, rod 42 is rockablysupported on a pin 44 pierced through a tab 46 integral with anddepending from the lower central section of pivoted arm 24. Rod 42 isaffixed to a lever 46 which is also rockable on pin 44 and which dependsfrom pin 44 at substantially a right angle to rod 42. Lever 46 has ashoulder formed therein at 48, the purpose of which will be relatedhereafter. Rod 42 is normally held in its operative position in agenerally horizontal plane, essentially parallel to pivoted arm 24, byvirtue of the support derived from a strand of yarn passing over bail 40as the yarn flows from its supply source to package P. For operativepurposes to become apparent hereafter it is necessary that bail 40 andlever 46 rock clockwise about pin 44 to arrest operation of the windingunit when the yarn breaks or the supply becomes exhausted. To this endan arcuate arm 50 is connected integrally with rod 42 and lever 46 onpin 44, said arm 50 extending rearwardly from pin 44. The outer end ofarm 50 mounts a counterweight 52. Hence, in the absence of yarn passingover bail 40 and serving to constrain the bail in a depressed positionas shown in FIG. 1, counterweight 52 operates to rock rod 42 generallyupwardly around pin 44, thereby causing bail 40 to lift, and causinglever 46 to swing forwardly around said pin.

A rocker arm 56 is suitably journalled for oscillating motion on a shaft58 extending the length of the machine and secured in bearings 60carried on frame 10. The rearward end of rocker arm 56 is connected to areciprocating rod 62 which is, in turn, connected to power haustion ofthe yarn strand passing over bail 40, the

counterweight 52 acts to rock lever 46 against striker 64 therebydisposing shoulder 48 in the plane of movement of striker 64. On thenext succeeding upward pick or stroke of striker 64, the striker hitsshoulder 48 driving pivoted arm 24 upwardly whereupon catch 32b snapsinto step 36a to hold the package P away from drive roll 16, therebyceasing the winding action of the winding unit. It will be apparent thatonce striker 64 and shoulder 48 have operated to lift arm 24 it isdesirable to remove lever 46 from the plane of motion of rockerv arm 56,simply so striker 64 will not continue to strike shoulder 48 on eachsucceeding upward stroke. To this end an appendage 66 is connected fastonto pin 44. An

elongated finger 68 is fastened as by screw 69 to hearing support 28 andprojects into the rotary plane of movement of appendage 66. Inconsequence of pivoted arm 24 being raised or swung clockwise aboutshaft 26, appendage 66 is brought into contact with finger 68. As aresult thereof, finger 68 depresses appendage 66 thereby rocking lever46 counterclockwise on pin 44 (FIG. I) to a position where shoulder 48is removed from the plane of striking motion of striker 64.

The twisting unit of the present invention is generally designated at 70and is generally similar to the multiple twist spindle unit disclosed inUS. Patent No. 2,478,926, issued August 16, 1949, to C. B. Kingsbury etal. The twisting unit includes a stationary holder 72 within which apackage of unt-wisted yarn, not shown, is supported on a spindle 74. Abonnet '75 is supported in a rim around the holder 72 and acts .as aballoon guard for the yarn unwinding from the package. The twister unit70 operates in the manner described in the patent just cited to delivera strand of yarn radially outwardly through an eye 76 in a rotatablefiyer or disc rotor 78 at the base of the Winding unit to thereby twistthe, yarn as described in the patent. The twisted yarn is drawn by afurnishing roll 80 rotatably carried on a shaft 82,

the yarn being drawn through a centering, balloon restricting guide 84disposed between the furnishing roll 80 and eye 76. The yarn is advancedfrom the furnishinlg roll 80 under a guide bar 85 and over bail 40 tothe winding unit which has already been described. Shaft 82 whichsupports furnishing roll 80 extends the full length of the machine andis mounted in suitable bea r in gs appropriately spaced and carried inupright stanchions along the machine, the stanchions and bearingsupports being omitted in the present drawing.

The spindle 74 serves as a mount for rotor 78. In

turn, spindle 74 is supported in a spindle bolster 85.

The lower section of spindle 74 has a whorl 88 formed therein. A belt 90is driven by any convenient source of power located at the head end ofthe machine, such source not being illustrated herein. Belt 90 is of theendless type and passes along the length of the machine, normally indriving contact with each of the spindle whorls. Thus as belt 90 isdriven each spindle 74 and each rotor 78, both of which are connected onsaid spindle whorl 88, is driven in a manner well known in the art. Aplurality of spaced idler pulleys 92 are carried on a horizontal rail 94in back of belt 90 to guide the belt and to apply a force opposing thethrust of wh-orl 88. Horizontal rail 94 may be suitably supported fromthe stanchions which have already been described,

asspaced along the machine in an upright position.

Spindle bolster 86 is supported in thelower end of an L-shaped arm 96 byany convenient means. L-shaped arm 96 is pivoted at its uppermost end ona pi-ntle 98 supported in a bracket 100. In turn, bracket 100 isattached to and carried by an elongated tubular bar 102 secured in aclamp unit 104. Said clamp unit 104 is fastened to the spacedstanchions, already mentioned.

L-shaped arm 96 has a wear-resistant pad 106 aflixed on its rear surfaceapproximately midway along its vertical extension. A bell-crank 108 isrockably supported on a stub shaft 110 embedded in the rear-most end ofan arm 112 supported on rail 94. The upper end of bellcrank 108 has aroller 114 thereon, this roller laying against the surface of pad 106.The rearward angular extension of bell-crank 108 is provided with aroller 115 loosely carried on a pin 116 connected to the outer, rearwardend of the bell crank 108. An elongated rod 118 is connected at itsupper end to stud 34 and is loosely engaged at its lower end with roller.115 for axially movement relative thereto. Desirably, the lower end ofrod 118 is provide with a threaded section accommodating a nut 119, saidnut being adjustable axially along rod 118, nut 119 is set in a positionspaced below roller 115 in order to provide a lost motion connectionbetween bell crank 108 and rod 118. It will be apparent that as pivotedarm 24 is raised in the fashion already related rod 118 will be lifted,thereby rocking roller 114 against pad 106. This action causes L-shapedarm 96 to be pushed clockwise about pintle 98, FIG. '1, thereby shiftingwhorl 88 forwardly of and away from belt 90. In consequence thereof thedriving power is removed from the twister unit 70 simultaneously withpackage P being lifted off drive roll 60 in response to y-a rn breakageor yarn exhaustion. A spring 120 connected at one of its ends to frame.and at the other end to L-shaped arm 96 serves to urge said arm 96counterclockwise to bias whorl 88 into driving engagement with belt 90when pressure from roller 114 is released from said L-shaped arm.

As the twister unit 70 is rocked from its driving position on belt 90,as just described, it is highly desirable that the bolster 86 be brakedin order that the yarn not be fed out of eye 76 by centrifugal forceand, further, to arrest rotation of the twister unit to afford theoperafor an opportunity to repair the yarn break or to replace theexhausted supply. Further, it is advantageous to trap the supply yarnend flowing out through eye 76 in order that this end will not becomeentangled with adjacent machine parts and belt 90. To these ends a pairof resilient, generally right angular members 121, 122 are connected attheir inner ends to the lower, outer end of L-shaped arm 96. Desirably,a bolt, not shown, passes through elongated slots in members 121, 122 sothat these members may be adjusted inwardly and outwardly relative toL-shaped arm 96. A brake shoe 124 is affixed in a stationary position tothe upper end of member 121, the brake shoe laying in the plane ofrotary movement of whorl 88. Said brake shoe 124 has a radius ofcurvature conforming to the curvature of the diameter of whorl 88 andsaid brake shoe lies in the plane of said whorl for frictional grippingcontact therewith. A frictional pad .126 of leather or the like issecured to the face of brake shoe 124 and assumes the curvature thereofto effectively arrest rotation of the whorl 88 rapidly when the whorl ispressed thereagainst.

An angular support-plate or stabilizer 128 is fastened at its inner endto rail 94 by a bolt 129 which passes through an elongated slot in saidstabilizer to afford slidable movement of said plate. The outer end 128aof stabilizer 128 is formed at a right angle to the main leg of saidstabilizer. This right angular end 128a is disposed to lay against theside of member 121 remote from the side of said member mounting brakeshoe 124 so that, as whorl 88 is pivoted outwardly or forwardly onL-shaped arm 96 as already described, the whorl contacts brake shoe 124and causes said member 121 to bear firmly against the right angular end1284 of stabilizer 128. At this time the frictional action of brake pad126 arrests rotation of the whorl. The advantageous arrangement by whichbrake shoe 124 is carried on resilient member 121 permits the brake shoeto align with the whorl 88 for braking purposes. By virtue of thisself-aligning feature, full contact of the brake shoe 124 with whorl 88is assured. Thus, efli-cient and chatter-free operation of the brakeshoe is achieved. Additionally, adjustment of spatial relationship ofbrake shoe 124 and angular end relative to whorl is adjustable by meansof the slidable movement afforded by the mounting of member 121 andstabilizer :128, respectively.

A further support plate or stabilizer 130 is affixed to stabilizer 128,as by a weld, and is slidable therewith. The right-angular end 1300 ofstabilizer 130 is turned to lay against the outer side of member 122.The upper end of member 122 has an extension 132 aflixed thereto byscrew 134. The upper end of extension [132 mounts a pad 136 offrictional material such as felt. Pad 136 lays in the general plane ofmovement of eye 76. As spindle unit 70 swings forwardly, as previouslydescribed, the lower end of rotor 78 having eye 76 therein, is contactedby pad 136. As rotor 78 pushes pad 136, during its forward swingingmotion on L-shaped arm 96 as previously described, member 122 is proppedagainst stabilizer 130. If the interruption in winding has occurred dueto breakage in the supply yarn between eye 76 and the winding unit, thesupply yarn is effectively trapped between pad 136 and the side of rotor78. Thus, in such event further feeding of the supply yarn which mayotherwise occur by centrifugal force through eye 76 is prevented.

A brief overall description of the foregoing apparatus will now bepresented. Strand of yarn Y is threaded through the twister unit 70 inthe known manner and is withdrawn outwardly therefrom through eye 76 ofrotatable rotor 78. The yarn is drawn upwardly passing through guide 84,over furnishing roll 80, under guide bar 85, the yarn thereafter beingdirected over bail 40 and wrapped about cop tube C. Thereafter, as driveroll 16 is rotated from shaft 14 winding of the yarn is commenced bylowering pivoted arm 24 to place cop tube C in peripheral contact withthe drive roll. With the commencement of rotation of drive roll 16,furnishing roll 80 is-driven to advance yarn from the twister unit 70 tocop tube C. It will be understood that simultaneously with thecommencement of the rotation of shafts 14 and 82 the means for operatingrocker arm 56 will also be energized whereupon the rocker arm will beginto pick or reciprocate on shaft 58 in the manner previously described.Further, whorl 88 of twister unit 70 will be in driving contact withbelt 90, the belt, in turn, being driven concurrently with operation ofdrive roll 16 and furnishing roll 80. In consequence thereof the spindle74 of the twister unit, and rotor 78, will be rapidly rotated to imparttwist to the yarn being wound. The twisted yarn will be taken up oncop-tube C. As the package diameter increases pivoted arm 24. willgradually swing clockwise around shaft 26. Rod 118 will lift in responseto movement of pivoted arm 24. Yet, bell crank 108 will, during winding,remain stationary since the lost motion con nection afforded by thespacing of nut 119 relative to roller permits rod 118 to move upward tosome extent before nut 119 contacts roller 115. In the event that thestrand of yarn Y should break during its movement from the supply sourceto cop tube C, or, on the other hand, if the supply should becomeexhausted, bail 40 will be released from the pressure of the yarn whichnormally serves to hold it down. As a result thereof rod 42 will bepermitted to rock clockwise about pin 44, see FIG. 1, this movementbeing assisted by the overbalancing effect of counterweight 52. Thiscauses shoulder 48 of lever 46 to swing clockwise or forwardly about pin44 into the operative path of striker 64. Thereafter, on the next upwardstroke of striker 64, the striker hits shoulder 48 thereby pushingpivoted arm 24 upwardly or clockwise about shaft 26. Catch 32b acts toengage in step 36a to hold the pivoted arm upwardly so that the packageis spaced away from drive roll 16 to prevent further rotation of saidpackage from the drive roll. As pivoted arm 24 is pushed upwardly in themanner just described rod 118 is also lifted causing bell crank 108 topivot in a counterclockwise direction about its stub shaft 110. Thisresults in L- shaped arm 96 being swung clockwise about pintle 98 torock twister unit 70 forwardly so as to remove whorl 88 from drivingengagement with belt 90. Thus, the driving power for the twister unit 70is removed. Simultaneously with the forward swinging moment of twisterspindle 70 whorl 88 engages with brake shoe 124, the brake shoe beingself-aligning with said whorl and being pressed against stabilizer *128.Thus, the pressure of the twister spindle unit in a forward directioncauses the whorl 88 to bear on brake shoe 124, the brake shoe, in turn,being supported against end 128a whereupon the brake is elfective toarrest rotation of the twister unit 70. Moreover, rotor 78 is engaged bypad 136, this pad bearin on the rotor in the plane of the yarn feedingeye 76. If the yarn interruption has occurred as a result of a break inthe yarn between the eye 76 and the winding unit the yarn tail whichprojects through eye 76 is eifectively trapped between pad 136 and theside of rotor 78, the length of yarn being wrapped around the peripheryof the rotor. Thus, the yarn is prevented from entangling with thedriving belt and the adjacent parts of the machine.

Since certain changes may be made in the above apparatus withoutdeparting from the scope of the invention herein involved, it isintended that all matter contained in the above description or shown inthe accompanying drawing shall be interpreted as illustrative only andnot in a limiting sense.

What is claimed is:

1. A machine for twisting and winding a strand of yarn comprising, arotatable spindle for supporting'a yam supply, said spindle having awhorl, drive means engageable by said whorl for rotating said whorl andspindle to impart twist in a strand of yarn drawn from said supply, apivotally mounted support for said spindle swingable to selectivelyengage said whorl with said drive means and to disengage said whorltherefrom; winding means including a pivotally mounted package supportarm, a takeup roll carried on said arm, a drive roll for engaging androtating said take-up roll to wind yarn on said take-up roll;reciprocable stop motion means operable in the absence of yarn flowingfrom said supply to said take-11p roll to pivot said arm to disengagesaid take-up roll from said drive roll, means for reciprocating saidstop-motion means, a linkage connected with said arm and movabletherewith to move said whorl out of engagement withsaid drive means assaid arm is pivoted to disengage said takeup roll from said drive roll,and a stationary brake positioned to receive said whorl upondisengagement from said drive means to arrest rotation of said spindle.

2. A machine for twisting and winding a strand of yarn comprising, arotatable spindle for supporting a yarn supply, said spindle having awhorl, drive means engageable by said whorl for rotating said whorl andspindle to impart twist in a strand of yarn drawn from said supply, apivotally mounted support for said spindle swingable to selectivelyengage said whorl with said drive means and to disengage said whorltherefrom; winding means including a pivotally mounted package supportarm, a take-up roll carried on said arm, a drive roll for engaging androtating said take-up roll to wind yarn on said take-up roll; areciprocating member, means for reciprocating said member, a leverdepending from said package support arm, said lever being disposed in afirst position spaced from said reciprocating member during winding ofyarn from said supply to said take-up roll, said lever being movable toa second position engageable with said reciprocating member whereby topivot said arm to disengage said take-up roll from said drive roll inthe absence of yarn flowing from said supply to said take-up roll, latchmeans for retaining said arm in said disengaged position, a resilientmember for resetting said lever to said first position when said arm isengaged with said latch, a linkage connected with said arm and movabletherewith to move said whorl out of engagement with said drive means assaid arm is pivoted to disengage said take-up roll from said drive roll,and a stationary brake positioned to receive said whorl upondisengagement from said drive means to arrest rotation of said spindle.

3. A machine for twisting and winding a strand of yarn comprising, arotatable spindle for supporting a yarn supply, said spindle having awhorl, drive means engageable by said whorl for rotating said whorl andspindle to impart twist in a strand of yarn drawn from said supply, apivotal-, ly mounted support for said spindle swingable to selectivelyengage said whorl with said drive means and to disengage said whorltherefrom; winding means including a pivotally mounted package supportarm, a take-up roll carried on said arm, a drive roll for engaging androtating said take-up roll to wind yarn on said take-up roll; areciprocating member, means for reciprocating said mem-. her, a leverdepending from said package support arm, a

bail connected with said lever, said bail being engageable by saidstrand of yarn flowing from said supply to said take-up roll to disposesaid lever in a first position spaced from said reciprocating member,said bail being rockable in the absence of yarn flowing from said supplyto said take-up roll to move said 'lever to a second position engageablewith said reciprocating member whereby to pivot said arm to disengagesaid take-up roll from said drive roll, a counterweight for rocking saidbail to move said lever to said second position, latch means forretaining said arm in said disengaged position, a resilient member forresetting said lever in said first position when said arm is engagedwith said latch, a linkage connected with said arm and movabletherewith, to move said whorl out of engagement with said drive means assaid arm is pivoted to disengage said take-up roll from said drive roll,and a stationary brake positioned to receive said whorl upondisengagement from said driving means to arrest rotation of saidspindle.

4. A machine for twisting'and winding a strand of yarn comprising, arotatable spindle for supporting a yarn sup-, ply, said spindle having awhorl, drive means engageable by said whorl for rotating said whorl andspindle to impart twist in a strand of yarn drawn from said supply, apivotally mounted support for said spindle swingable to selectivelyengage said whorl with said drive means and to disengage said whorltherefrom; winding means including a pivotally mounted package supportarm, a take-up roll carried on said arm, a drive roll for engaging androtating said take-up roll to wind yarn on said take-up roll;reciprocable stop motion means operable in the absence of yarn flowingfrom said supply to said take-up roll to pivot said arm to disengagesaid take-up roll from said drive roll, means for reciprocating saidstop motion means, a linkage connected with ,said arm and movabletherewith, said linkage being operable to move said whorl out ofengagement with said drive means as said arm is pivoted to disengagesaid take-up roll fromsaid drive roll, a stationary brake positioned toreceive said whorl upon disengagement from said drive means, andself-aligning means carrying said brake whereby said brake aligns withsaid whorl when contacted thereby to arrest rotation of said spindle.

5. A machine for twisting and winding a strand of yarn comprising, arotatable spindle for supporting a yarn supply, said spindle having awhorl, drive means engageable by said whorl for rotating said whorl andspindle tQ impart twist in a strand of yarn drawn from said supply, apivotally mounted support for said spindle swingable to selectivelyengage said whorl with said drive means and to disengage said whorltherefrom; winding means including a pivotally mounted package supportarm, a takeup roll carried on said arm, a drive roll for engaging androtating said tape-up roll to wind yarn on said take-up roll; stopmotion means operable in the absence of yarn flowing from said supply tosaid take-up roll to pivot said arm to disengage said take-up roll fromsaid drive roll, a linkage connected with said arm'and movabletherewith, said linkage being operable to move said whorl out ofengagement with said drive means as said arm is pivoted to disengagesaid take-up roll from said drive roll; a stationary brake, said brakeincluding a pad of frictional material having a braking surface with aradius of curvature conforming to the curvature of said whorl, aself-aligning means carrying said brake; said whorl being engageablewith said pad during its disengaging movement, said self-aligning memberbeing responsive to engagement of said whorl with said pad to align saidpad with said whorl whereby substantially the full braking face engageswith said whorl to arrest rotation of said spindle.

6. A machine for twisting and winding a strand of yarn comprising, arotatable spindle for supporting a yarn supply, said spindle having awhorl and a rotor atfixed thereon, said rotor having an eye therein toprovide a passage for a strand of yarn drawn from said supply .to betwisted, drive means engageable with said whorl to rtate said whorlspindle and rotor, a pivotally mounted support for said spindleswingable to selectively engage said whorl with said drive means and todisengage said whorl therefrom; winding means including a pivotallymounted package support arm, a take-up roll carried on said arm, a driveroll for engaging and rotating said takeup roll to wind yarn on saidtake-up roll; stop motion means operable in the absence of yarn flowingfrom said supply to said take-up roll to pivot said arm to disengagesaid take-up roll from said drive roll, a linkage connected with saidarm and movable therewith, said linkage being operable to move saidwhorl out of engagement with said drive means as said arm is pivoted todisengage said takeup roll from said drive roll; a stationary brakepositioned to receive said whorl upon disengagement from said drivemeans, a self-aligning means carrying said brake whereby said brakealigns with said whorl when contacted thereby to arrest rotation of saidspindle; and stationary yarn catching member positioned in the plane ofmovement of said eye, said yarn catching member being operable to engagesaid strand of yarn passing through said eye as said whorl engages saidbrake to wrap the yarn around said rotor and prevent the yarn fromfeeding through said eye.

7. A machine for twisting and winding a strand of yarn comprising, arotatable spindle for supporting a yarn supply, said spindle having awhorl and a rotor, aflixed thereon, said rotor having an eye therein toprovide a passage for a strand of yarn drawn from said supply to betwisted, drive means engageable with said whorl to rotate said whorl,spindle and rotor, a pivotally mounted support for said spindleswingable to selectively engage said whorl with said drive means and todisengage said whorl therefrom; winding means including a pivotallymounted package support arm, a take-up roll carried on said arm, a driveroll for engaging and rotating said takeup roll to wind yarn on saidtake-up roll; stop motion means operable in the absence of yarn flowingfrom said supply to said take-up roll to pivot said arm to disengagesaid take-up roll from said drive roll, a linkage connected with saidarm and movable therewith, said linkage being operable to move saidwhorl out of engagement with said drive means as said arm is pivoted todisengage said takeup roll from said drive roll; a stationary brakepositioned to receive said whorl upon disengagement from said drivemeans, a self-aligning means carrying said brake whereby said brakealigns with said whorl when contacted thereby to arrest rotation of saidspindle, a stationary yarn catching member positioned in the plane ofmovement of said eye, said yarn catching member being operable to engagesaid strand of yarn passing through said eye as said whorl engages saidbrake to wrap the yarn around said rotor and prevent the yarn fromfeeding through said eye, a first support plate arranged to hold saidbrake in said stationary position, and a second support plate forretaining said yarn catching member in said stationary position.

References Cited by the Examiner UNITED STATES PATENTS 2,5 84,096 1/1952 Thomas 57-80 2,599,256 6/ 1952 Hartley et a1 5780 X 2,786,324 3/1957 Keith et a1 57-89 FRANK J. COHEN, Primary Examiner.

D. E. WATKINS, Assistant Examiner.

1. A MACHINE FOR TWISTING AND WINDING A STRAND OF YARN COMPRISING, AROTATABLE SPINDLE FOR SUPPORTING A YARN SUPPLY, SAID SPINDLE HAVING AWHORL, DRIVE MEANS ENGAGEABLE BY SAID WHORL FOR ROTATING SAID WHORL ANDSPINDLE TO IMPART TWIST IN A STRAND OF YARN DRAWN FROM SAID SUPPLY, APIVOTALLY MOUNTED SUPPORT FOR SAID SPINDLE SWINGABLE TO SELECTIVELYENGAGE SAID WHORL WITH SAID DRIVE MEANS AND TO DISENGAGE SAID WHORLTHEREFROM; WINDING MEANS INCLUDING A PIVOTALLY MOUNTED PACKAGE SUPPORTARM, A TAKEUP ROLL CARRIED ON SAID ARM, A DRIVE ROLL FOR ENGAGING ANDROTATING SAID TAKE-UP ROLL TO WIND YARN ON SAID TAKE-UP ROLL;RECIPROCABLE STOP MOTION MEANS OPERABLE IN THE ABSENCE OF YARN FLOWINGFROM SAID SUPPLY TO SAID TAKE-UP ROLL TO PIVOT SAID ARM TO DISENGAGESAID TAKE-UP ROLL FROM SAID DRIVE ROLL, MEANS FOR RECIPROCATING SAIDSTOP-MOTION MEANS, A LINKAGE CONNECTED WITH SAID YARN AND MOVABLETHEREWITH TO MOVE SAID WHORL OUT OF ENGAGEMENT WITH SAID DRIVE MEANS ASSAID ARM IS PIVOTED TO DISENGAGE SAID TAKEUP ROLL FROM SAID DRIVE ROLL,AND A STATIONARY BRAKE POSITIONED TO RECEIVE SAID WHORL UPONDISENGAGEMENT FROM SAID DRIVE MEANS TO ARREST ROTATION OF SAID SPINDLE.